Slaughtering knife



Oct. 31, 1939. J. A. wiLsoN SLAUGHTERING KNIFE Filed June 19. 1956 4MM Mlm 0MM Patented Oct. 31, 1939 UNITED STATES PATENT OFFlCiE 3 Claims.

My invention relates to improvements in slaughtering devices such as those shown in patents to Wilson, 1,428,672, patented Sept. 12, 1922, and 2,001,232, patented May 14, 1935.

The primary object of this invention is to simplify the entire arrangement, reducing the number of parts in the knife.

Another object of my invention is to provide a slaughtering device which can be easily and thoroughly cleaned, simple and inexpensive to manufacture and to operate and one which draws the blood through the pump to an open tank for storage or to an open container for edible purposes, requiring no special tanks, no vacuum pump or compressor.

Other objects of this invention will appear in the following detailed description taken in connection with the drawing forming a part of this specification, in which drawing:

Figure 1 is an elevation of the improved sticking knife used in the improved device.

Figure 2 represents the shield to be placed around the ports in the stem of the knife.

Figure 3 is a vertical longitudinal section through the improved sticking knife.

Figure 4 is an elevation of the upper part of the improved knife with the outer shield removed.

Figure 5 is a section taken along the line 5 5 of Figure 1.

The improved sticking knife clearly shown in Figures 1, 2, 3, 4 and 5 of the drawing includes a hollow tubular stem 2| having its upper end internally threaded for the reception of the externally threaded head 2a formed on the lower end of the cone 2 into which the blade is securely fastened, in a slot in the cone 2, by means of a rivet. The blade may be of any desired configuration and as shown is shaped like the point of an arrow. An upper portion of the tube 2| is reduced in size as shown at 8 in Figure 3; and in that portion so reduced, there are longitudinal ports 4a placed at equal distances around the tube. At the top of the tube 2| and at the bottom of that portion of the tube 2| which is reduced are rings 8b and 8a somewhat smaller than the main part of the tube 2 around which is placed a shield 3; there are longitudinal ports 4 placed at equal distance around the shield 3, the shield being so placed that as shown by the sectional view shown in Figure 5, the ports 4 are situated opposite the spaces between the ports 4a and are held in that position' by means of the pin made fast in the tube 2|; a semicircular notch 'la being cut in the lower edge of the shield fits the upper radius of this pin; a like notch 'lb is cut in the upper edge of the shield 3 to facilitate assembling, as by this arrangement either end of the shield may be placed at the bottom. The cone 2 is of the same diameter at 5 its base as the diameter of the shield 3; therefore, when the shield 3 is in its place and the cone 2 is screwed into its place the shield will be held firmly with the parts of its walls that are between its ports situated directly outside of the 10 ports 4a in the tube 2 l, which arrangement keeps the esh surrounding the wound away from the ports 4a in the tube 2| and allows the blood to flow through ports 4a. At a distance below the shield is placed a disk |6 the purpose of which 15 is to stop the thrust of the knife at a certain depth; above the disk I6 there is a pair of diametrically opposed longitudinally extending grooves I0 which form recesses into which the links and the leaves I2 and the projections 20 |2a are drawn after the animal has been bled. Links leaves l2 and the projections |2a are designed for the purpose of holding the knife in place in the wound. The links are pivotally connected to the walls of the tube 2|, as at 9; 25 the leaves l2 are pivotally connected as at l5 to the upper ends of the rods 20; 'links Il and leaves |2 of each pair are hingedly connected together as at ld; and the lower ends of the rods 2B are firmly fastened to the slidably mounted 30 collar I9 which forms means for operating the leaves and links. Leaf |2 of each pair has a relatively narrow portion |2a which extends from a point near the middle of the leaf to the outer` extremity. The leaf is pivoted by means of the 35 reduced portion near the middle, to the link which is slotted at E3 so as to form a fork to receive the leaf l2 when the link and the leaf lie in a straight line. When the link and the leaf lie in this position, the pins, 9, M and l5 are not 40 in line as the pin I4 is placed farther out than pins 9 and I5, which will cause the link and leaf to swing outwardly and not inwardly when upward pressure is exerted against them. When the rods are moved upwardly as in Figure 1, the 45 leaves |2 and the links will swing outwardly and the projections |2a will penetrate the walls of the wound serving to hold the device securely in place. When the rods 29 are moved downwardly as in Figure 3, the projections |2a will be 50 drawn into slots i3 and the links Il and the leaves I2 will be drawn into the grooves I0. The collar i9 is operated by means of the projections ISG, extending therefrom, by the hand of the operator. After the knife is thrust into the throat of the animal by the hand of the operator, the hand will glide along the tube 2| and contact the projections 19a, pushing the collar I8 upward, compressing the spring I1, causing the rods 29 to move upwardly until the spring catch I8 will hold the collar in place. After the animal has been bled the operator will release the spring catch i8 and the force of the spring il will move the collar downward, causing the rods to move downward, withdrawing the projections I 2a from the walls of the wound, allowing the device to be removed from the wound. The tube 2l is reduced in diameter below the disk I6 to allow the collar i9 to slide, and below the collar a suction hose is fastened.

To operate this device, the operator first connects a suction hose at 2l, then thrusts the knife into the throat of the animal until the disk IG is pressed against the skin, then presses upward against the projections ila of the collar I9 until the spring catch I8 securely latches upon the projection 29a; he can then let loose of the knife until the animal is bled, when he will release the catch i3 and the spring l1 will act upon the collar i9, removing the projections 12a, and allowing the knife to be withdrawn.

I am aware that prior to rny invention devices have been made, designed to be used in connection with a method and apparatus for removing the blood from animals in process of slaughtering, invented by ine and patented Sept. 12, 1922, under Patent Number 1,423,672, also Patent Number 2,001,232, issued May 14, 1935. I therefore do not claim such combination broadly, but I claim:

1. A slaughtering knife comprising a hollow stein adapted to convey blood, a cutting blade attached at the upper end of said stem, said stem havinCr apertures below said cutting blade to admit blood to the interior of the stem, said stern having cppositely disposed longitudinally extending grooves formed on the exterior thereof below said apertures, hingedly connected links, leaves and rods, each of said links being pivoted within one of said grooves and pivoted to one of the leaves at a point intermediate the ends of the leaf, and a reciprocable collar surrounding said stern below said links and leaves, and fastened to said rods, said links, leaves, rods and collar being so disposed that said collar, in its upper position, causes said leaves to project outwardly from the stem, and, in its lower position, causes said leaves to lie in said grooves.

2. In an animal-slaughtering device, a knife comprising a hollow stem, a blade carried by the stem, said stem having a part adjacent said blade of reduced diameter and circumferentially spaced ports on said part, a ring at top and a ring at bottoni of said part, said rings having a diameter larger than said part and smaller than said stem, and a removable cylindrical shield, having a turning iit on said rings and provided with circumferentially spaced ports, said shield having its ports lying opposite the closed portions of the reduced part of said stem, so as to prevent esh particles from entering the hollow stem.

3. A slaughtering knife comprising a hollow stem adapted to convey blood, a cutting blade attached at the upper end of said stem, said stem having apertures below said cutting blade communicating with the inside of said stem, said stem having oppositely disposed, longitudinally extending grooves on the exterior thereof below said apertures, hingedly connected links, leaves and rods, each of said links being pivoted within one of said grooves and pivoted to one of the leaves at a point intermediate the ends of the leaf, so that the leaves may be extended or retracted within the grooves, a reciprocable collar surrounding said stem below said links and leaves,

and fastened to said rods, a disk surrounding said stern and fixedly mounted below said links and leaves, a spring between said collar and disk urging said collar downwardly, and latch means secured to said disk and releasably engaging said collar so as to releasably hold said collar in its upper position and the leaves in their extended position.

J OHN ALLISON W'ILSON. 

